A SPECT nuclear scan of the heart to show perfusion defects in the myocardium due to coronary artery blockages or heart attack. The imaging uses the Mo-99 based medical imaging isotope Tc-99m. The U.S. government has created policy to move away from use of highly enriched uranium (HEU) to low-enriched uranium (LEU) for Mo-99 isotope production, but there is one holdout who has not yet converted before a 2020 deadline. Photo courtesy of Philips Healthcare.

Displacement comparison at the end-systolic frame and final frame. The three patients (V6, V10, V16) with different left-ventricle walls are shown. Point-to-surface distance is a measure to estimate the distance of a point from the reference surface. Image courtesy of WMG, University of Warwick